renpirate:In response to you original question, technically, yes you can go straight to AI.
Prerequisites:
Certification as NAUI Master Scuba Diver and NAUI Scuba Rescue Diver or their eqivalent. Divers with evidence of equivalent training and experience may be enrolled provided they pass the NAUI Master and Rescue Scuba Diver written examination with minimum scores of at least 75% on each. NAUI S&P Rev.1-04 Pg. 2.77
However, one thing you have to understand about NAUI is that our standards are minimums only. Instructors may require higher standards and will be fully backed by NAUI. So, yes the standards say it is possible, but if your instructor requires that you do the NAUI Master Diver Course, then that is what you must do.
Provided that the divers qualificatiosn are from a recognized agency as listed in the back of NAUI Standards.
By the way if the OP isn't being used to meet ratios and isn't doing weght checks in the water (any other way to do them??) and isn't being charged with supervising/assisting students at any point it wouldn't be breaking standards, he/she is just an extra back moving stuff for the instructor. If the OP is at ANY point being told to watch the student, do any skills with students, explain stuff to students then it would be breaking standards.
Regardless of "standards" being broken, in the event of an accident the instructor would be hard pressed to defend having a "unqualified" assistant of any ilk/capacity and it would make legal defense difficult.
Persons who have completed a NAUI Training Assistant specialty are only for use as assistants but not for ratios
Best,
Chris
NAUI Course Director, NAUI Rep.